Hello AlexK,
In order to achieve your requirement, you can do the following:
- In the Pivot >> Data Groupings >> Categories >> General, group by "Title": =Fields!Title
- In the Pivot >> Values >> General >> Data, use the following expression in the Value field: =SUM(Fields!Value) / Fields![RowCount]

Hopefully this helps.

Best Regards,
Nevron Support Team

Hello,

I have the following data model in a List:

Now I want to show the average value and use the empty values as 0-value. For example the AVG(Fields!Title) should be 

10 for A (=(20+0) / 2)
0 for B
30 for C

how can I bring it to work?

Regards,

Alexk